Switched on the bike this monring and the exup motor was all over the shop again. The bike started ok but on the ride in it went funny coughed and spluttered and the ecu light was on, the valve eventually opened fully and the exhaust note changed and its rideable. What's annoying is that i only had the exhaust headers replaced a few months ago under warranty and now im out of warranty, could they have missed something in the diagnosis? Im going to give them a call later today and see what they say but i wont be pleased if i end up with a bill!!